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Originally Posted by KingLT1
All good points mentioned so far.
One thing to clarify, The LT1 fuel system will be near or at it's limits soon as the supercharger is bolted on. There is no room for pullying down. It would be octane limited on 93 even if it had more fuel system available. It will need the LT4 high side and JMS low side minimum, and the ethanol will need to be blended to around E50 as mentioned in post #2. If the OP wants full E85 then he is going to have to look into a LPE HPFP pump and +30 injectors which would be capable on 8-9psi. Pulley down for 10-11psi and you will be blending to E60 unless targeting a lean AFR. Or go Port Injection.
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I heard port injection was good for running full E85 with stock LT1 fueling but haven't looked too much into it. If I were to daily drive the car with the supercharger would it be better to go back to 91 octane, run port injection or upgrade fueling system?